下列是小明对所学化学知识的总结,其中连线完全错误的是[ ]
A.
B.
C.
D.
答案:B
She spends one hour in ________her homework every day. [ ]
A. does
B. to do
C. do
D. doing
安全帽在使用前应检查()下颏带等附件完好无损。
A、帽壳
B、帽衬
C、帽箍
D、顶衬