直螺纹连接同一施工条件下采用同一批材料的同等级、同型式、同规格接头以（）个为一个验收批。
A.100
B.200
C.300
D.500
参考答案：D
He told us ______ exciting news that we all cheered with joy.
A．such
B．so
C．such an
D．such a
一Have you heard of report? The price of gold is going down again!
A．the; the
B．／; the
C．the; ／
D．／;／
