【单选题】The children are looking at a large, hairy( 毛的 ) ape at the zoo . Ape is ____.
【单选题】From the passage, we can learn that the reason why the ape could not get the banana if the stick was behind him while the banana was in front of him is______.
A.
that the ape was unable to find where the stick was
B.
that the ape forgot about the banana when it turned around to find the stick
C.
that the ape didn't see the banana and the stick in the meanwhile and it couldn't remember the banana long enough to get the stick and use it
D.
that the ape was not clever enough to catch sight of the banana and the stick at the same time
【判断题】氨基酸-tRNA连接酶只催化一种氨基酸与其受体tRNA的连接反应,属于 绝对专一性。
【单选题】精氨酸可以在一氧化氮合酶 (nitric oxide synthase, NOS) 催化下生成一氧化氮 (nitric oxide,NO) , NO 的受体属于( )