建筑施工安全检查时,对于被扣式钢管脚手架检查评定保证项目包括()等。
A.架障防护
B.脚手板
C.架体基础
D.杆件锁件
E.施工方案
参考答案:B, C, D, E
按要求改写句型。
1. He's going to tell me all about it. (改为一般疑问句)
________ he _________ tell me all about it?
2. They are going to the West Lake. (改为否定句)
They ________ to the West Lake.
3. She's going to work hard at English this term.(就划线部分提问)
_________ she ________ this term?
4. They are going to leave next Tuesday.(就划线部分提问)
________ they going to leave?
5. The children are going to the zoo by bike. (就划线部分提问)
________ the children ________ to the zoo?
用显微镜观察紫色洋葱表皮细胞时,一般看不到染色体,这是因为( )
A.紫色液泡干扰了观察
B.染色体没有被染色
C.洋葱表皮细胞一般不分裂
D.洋葱表皮细胞无细胞核