monomer-sequenstering protein (单体隔离蛋白)

It's too bad that my computer has got a new virus. If only I _____ that programme! [ ]

A. didn't run

B. haven't run

C. hadn't run

D. wouldn't run

用一个10倍的放大镜看一个30^。的角，这个角是[ ]

A．10^。           

B．30^。          

C．300^。

有明显的肝肠循环特点维持时间较长的抗生素：

A．环丙沙星
B．利福平
C．多西环素
D．磺胺嘧啶
E．庆大霉素

风光摄影采用自动曝光模式拍照时应注意曝光补偿的运用。通常的做法是“遇亮要减，遇暗要加”。( )

构成刑事罪犯必须具备哪些条件？