关于水泥砂浆锚杆,下列叙述正确的是()。
A.砂浆宜采用粗砂
B.水灰比宜为0.5~0.55
C.锚杆使用前,除锈
参考答案:C
—Would you like to come and eat ________ dinner ________ us?
—Yes, I'd love to. [ ]
A. the, for
B. a , in
C. / , with
D. an, to
Mike was ill yesterday, he didn' t go to school.
A.if
B.but
C.so
D.or