【判断题】【消耗次数：1】
随机变量只有离散型和连续型。
①
正确
②
错误
参考答案：
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随机题目
【单选题】
如果你对网页上的一段图文信息感兴趣，想保存到本地硬盘，最好进行＿＿＿＿操作。
①
选择“文件”菜单中的“另存为”菜单命令，保存为WEB页格式
②
保存这个文件的源代码即可
③
全选这段信息，然后按右键选“目标另存为”，保存到本地硬盘
④
文字、图片分开来复制
【单选题】
Our modern civilization must not be thought of as ＿＿＿＿＿＿ in a short period of time.
①
having creaｔed
②
creating
③
having been creaｔed
④
being creaｔed
【单选题】
By the time she is 50 years old, she ＿＿＿＿＿ an inmate of the prison for over half of her life.
①
would be
②
would have been
③
will have been
④
will be
【单选题】
He has been writing the essay the whole morning and he still ＿＿＿ .
①
has been
②
does
③
has
④
is
【单选题】
Greater efforts to increase agricultural production must be made if food shortage ＿＿＿＿＿＿ avoided.
①
is to be
②
can be
③
has been
④
will be
【单选题】
There was a knock at the door. It was the second time someone ＿＿＿＿＿ me that evening.
①
to have interrupted
②
would have interrupted
③
to interrupt
④
had interrupted
【单选题】
He didn’t show up at the party yesterday. He ＿＿＿＿ in the lab.
①
must have been busy working
②
must be busy wording
③
must be busy to work
④
would have been busy working
【单选题】
Marlin is an independent man who is not about ＿＿＿＿＿ on his parents any more.
①
having relied
②
to rely
③
relying
④
to have relied
【单选题】
It ＿＿＿＿＿ for over a month and the downpour had damaged many houses.
①
has rained cats and dogs
②
has been raining heavily
③
rained heavily
④
had been raining cats and dogs