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【单选题】
关于实验设计,下列说法不正确的是( )。A.
是在确定实验目的和实验假设之后,为检验实验假设而设计的具体实验方案
B.
是关于如何操纵自变量、如何观测因变量以及如何控制额外变量的具体计划
C.
如果实验设计合理,就可以证明变量之间的因果关系
D.
如果实验实验设计不合理,也能够达成实验目的的
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【简答题】通常访问一个单位的Web网站时，首先进入的网页被称为【 】。
【单选题】He has a daughter____ works in a hospital
A.
Who/which
B.
who / that
C.
which /that
D.
whose/whom
【单选题】—There _______ little fresh water _______. —Don't worry. We'll soon walk out of the desert. [ ]
A.
has; drinking
B.
are; to drink
C.
is; to drink
【单选题】— Go and ask the waiter how much _____. — Don't worry. It has been _____. [ ]
A.
does the meal cost, paid for
B.
the meal costs, paid
C.
the meal spends, paid
D.
the meal costs, paid for
【单选题】He has a daughter____ works in a hospital
A.
who/that
B.
which/that
C.
which/who
D.
whose/whom
【单选题】A short __________ of natural gas has caused a lot of economic experts to worry. [ ]
A.
supply
B.
use
C.
product
D.
information
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