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【单选题】
质粒载体中构建lacZ基因的目的是:A.
编码蓝色色素产物，可用于检测转化的细胞
B.
编码一种可检测的酶，当基因内部的位点插入任何外源片段，破坏阅读框，产物不能表达
C.
编码一种酶，可将RNA转化为DNA
D.
仅为提供多克隆位点
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皮皮学刷刷变学霸
举一反三
【单选题】I was not conscious ______ being alone in the room until I finished reading the book.
A.
from
B.
of
C.
in
D.
with
【单选题】I was not conscious __________ being alone in the room until I finished reading the book.
A.
of
B.
in
C.
for
D.
to
【单选题】I was not conscious( )being alone in the room until I finished reading the book.
A.
with
B.
in
C.
away
D.
of
【单选题】I was not conscious __________ being alone in the room until I finished reading the book.
A.
off
B.
on
C.
of
D.
in
【单选题】I _______ being alone in the house, for I want to go on with my novel writing.
A.
look after
B.
look up
C.
look forward to
D.
look for
【简答题】编写程序,输入一个n,计算并输出下列算式的值。要求定义和调用函数total(n)计算1+1/2+1/3+......+1/n,函数返回值的类型是double。
【简答题】编写程序输出m和n之间所有的Fibonacci数。要求定义并调用函数fib(n),它的功能是返回第n项Fibonacci数。例如fib(7)的返回值是13.
【简答题】使用函数输出一个数的逆序数:输入一个整数,将它逆序输出。要求定义并调用函数reverse(n),它的功能是返回n的逆序数,例如reverse(12345)的返回值是54321.试编写相应程序。
【单选题】I was not conscious __________ being alone in the room until I finished reading the book.
A.
up
B.
of
C.
off
D.
onto
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