原核生物转录生成的mRNA属于
A．内含子B．多顺反子C．RNA聚合酶ⅡD．原核RNA聚合酶口E．多聚A聚合酶
参考答案：B
—what_______________ your mother like?
—She likes films and she often_________________ films on computer.
A．is; looks at
B．is; sees
C．does; sees
D．does; looks at
注射操作时需常规进行三查、七对。三查指_____；七对指_____.
