問題詳情

點擊查看答案

內容推薦

• In the presence of an antibiotic prokaryotic translation can initiate, but only dipeptides that
• According to the wobble rules, a tRNA with the anticodon 5'-GAU-3' can recognize the c
• Cephalization is generally associated with all of the following except(A) bilateral symmetry. (B
• How do cleavage divisions differ from normal mitotic cell divisions?(A) Cleavage divisions occur
• If two modern organisms are distantly related in an evolutionary sense, then one should expect t
• A gastrovascular cavity, with a single opening, is the characteristic digestive system of animal
• The endoplasmic reticulum and Golgi apparatus are very similar among the groups of alga-like pro
• Which of the following statements about endocrine system is false?(A) Hormones from the adrenal
• 圖四為三國鼎立形勢圖，請問：以下何者正確？(A)三國立國的先後順序為甲→乙→丙(B)三國鼎立的局面和赤壁之戰有關(C)三國亡國的先後順序為乙→丙→甲(D)司馬睿結束了三國以來的分裂局面。
• The population cycle of the snowshoe hare and its predator indicates that(A) predators are not t

內容推薦

• A long solenoid of 500 turns carrying a current of 8 A produces within itself a uniform magneti
• A sample of 770 mol of nitrogen gas is maintained at a constant pressure of 00 atm in a flexibl
• A cylinder of mass 0 kg rolls without slipping on a horizontal surface. At the instant when it
• 右圖為均佈荷重的簡支樑，下列何者不是最大力矩(moment) M 的所在位置？(A)剪力為零處(B) dM / dx = 0 處(C)左方支點處(D)樑的中央處
• A 00-kg mass is attached to a horizontal spring. The spring is initially stretched by 0.100 m a
• What is the absolute pressure at the bottom of a lake that is 0 m deep, when the air pressure
• Suppose that the temperature at the center of the Sun is 00×107 K, what is the average translat
• When radiation of wavelength 350 nm is incident on a surface, the maximum kinetic energy of the p
• A nonconducting sphere of radius 10 cm has charge uniformly distributed throughout its volume. T
• A magnetic field given by B（t）=0.2t - 0.5t2 T is directed perpendicular to the plane of a circula
• An important observation that led Bohr to formulate his model of the hydrogen atom was the fact
• If the peak electric field in an electromagnetic wave is 1200 V/m , what is the peak magnetic fi
• An electron in the hydrogen atom makes a transition from the n=5 level to the n=2 level. What is
• A proton is projected toward a fixed nucleus of charge +Ze with velocity V0 . Initially the two
• Electromagnetic standing waves are set up in a conducting cavity resonator in the form of a holl
• The square plates of a 9000 pF capacitor measure 90 mm by 90 mm and are separated by a dielectri
• The potential energy function of a particle moving in one dimension is U=kx2e−x2/a2where  a =
• A 0µF capacitor with an initial stored energy of 0.50 J is discharged through a 0 MΩ resisto
• A proton with speed  v = 00×105m/s orbits just outside a charged sphere. The radius of the orb
• A hollow sphere of inner radius 0 cm and outer radius 0 cm floats half-submerged in a liquid
• A girl is sitting near the open window of a train that is moving at a velocity 00m/s to the e
• Two point charges q1=1×10-8C and q2 = −4q1 are fixed in two places 50 cm apart. The point char
• Three sinusoidal waves of the same frequency travel along a string in positive direction of an x
• 於道路施作自來水管埋設，有關作業安全與交通維護，下列何者不是應有之設置？(A)圍籬 (B)拒馬 (C)夜間警示燈 (D)攝影裝置
• A 0 g marble is fired vertically upward from a spring gun. The spring must be compressed 0 c