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【单选题】
According to the passage, ______.A.
security alarm systems can only be installed in commercial and industrial establishments and in large homes
B.
security alarm systems are still very expensive
C.
now, people can buy low-cost security alarm systems and install themselves
D.
security alarm systems can't scare off vandals
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【多选题】What are t he main functions of LSE?
A.
It provides a market where investors can buy and sell securities easily and quickly.
B.
The UK stock market system helps to ensure that the price at which a deal is done is fair.
C.
The existence of the ready secondary market it easier for companies and others who wish to raise capital to do so.
D.
It allows the pooling of investors' short-term savings to meet the long-term requirements for companies, the government and other organisations.
E.
It ensures there are stable prices and confidence in sterling.
【单选题】— Don’t you agree with what he said? —Yes，_______! It can’t be better．
A.
approximately
B.
absolutely
C.
relatively
D.
partly
【单选题】下列哪一项不属于电力系统运行生产的特点( )
A.
电力系统的电能生产、输送、分配和使用过程是同时进行,缺一不可的
B.
电力系统的运行生产与国民经济及人民生活关系密切,影响重大
C.
电力系统的运行需要保证安全可靠地供电
D.
电力系统运行中发生变化的速度很快,即过渡过程非常短促
【简答题】什么是中位数?如何确定?
【单选题】— What is he doing? — __________________ [ ]
A.
She is reaching.
B.
He is jumping.
C.
They're smiling.
【单选题】what is t he main reasons for infantile constipation?
A.
improper diet
B.
irregular defecation
C.
the congenital physiological and anatomical defects
D.
Mental factors
E.
all of above
【单选题】— What ____________ doing? — They're drinking tea. [ ]
A.
are they
B.
is he
C.
they are
【简答题】求出下面这组数据的中位数和平均数． 1015182532343848 中位数是______，平均数是______．
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