梅毒血清学试验应在以下哪个时间检查:()
A.1~2周
B.2周后
C.3周后
D.4周后
E.5周后
参考答案:D
根据短文内容和所给的首字母,填入单词。
Daniel is a c 1 young boy. He can learn things q 2 . He can use the c 3 well. He often helps
at the Helping Hands C 4 . He d 5 the computer work and sometimes gets i 6 from the
Internet for the club. He is thoughtful and t 7 carefully when he works. He plans e 8 well and
works well in a team. We all like him.
采煤工作面有哪些支护方式?