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【判断题】
位错属于线缺陷，因为它的晶格畸变区是一条几何线。A.
正确
B.
错误
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举一反三
【多选题】下列关于股指期货的描述，正确的是（ ）。
A.
股指期货交易的标的物是股票价值指数
B.
目前，股指期货交易已成为金融期货第一大品种
C.
每一股指期货合约都有预先确定的每点所代表的固定金额，这一金额称为合约乘数
D.
股指期货采用现金交割
【单选题】关于股指期货期权的说法，正确的是（ ）。
A.
股指期货期权的标的物是特定的股指期货合约
B.
股指期货期权的标的物是特定的股指期权合约
C.
股指期货期权的标的物是特定的股票价格指数
D.
股指期权既是一种期权合约，也是一种期货合约
【单选题】Mike put his hands behind his back, ____ nobody could see them. [ ]
A.
so
B.
because
C.
or
D.
but
【单选题】Another man saw the waiter, and put his hands on his stomach meant he ______.
A.
had a stomach-ache
B.
was hungry
C.
was very thirsty
D.
was full
【单选题】Where is the person advised to put his hands during the contest?
A.
On the table.
B.
Behind his back.
C.
Under his bottom.
D.
On his lap.
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