题目内容

The stone bit him

A. on the left eye
B. over the left eye
C. in the left eye

查看答案
更多问题

When the students came into the classroom, the teacher ______ on the blackboard.

A. was writing
B. is writing
C. wrote

My mother asked me ______ her with the cooking.

A. helps
B. to help
C. helping

消化性溃疡的流行病学调查正确的是

A. 我国十二指肠壶腹部溃疡和胃溃疡发病率相同
B. 女性与男性之比约为3~4:1
C. 60岁以上老年人一般不发生
D. 十二指肠壶腹部溃疡近年来发病率下降
E. 胃溃疡多见于胃角和胃窦

二氧化钛

A. 成型材料
B. 增塑剂
C. 避光剂
D. 防腐剂
E. 增稠剂

答案查题题库