某实验需要10.2g食盐,一位同学在称量时发现天平指针向左偏转,此时他应该[ ]
A. 添加砝码
B.移动游码
C. 添加食盐
D.减少食盐
答案:D
根据句意及所给首字母提示,写出正确单词
1. l_____: make something start to burn and shine.
2. f_____: a place for growing grains, plants and keeping animals.
3. w_____: a deep hole in the ground from which we get water etc.
4. c_____: cut by striking with a knife, etc.
5. g_____: a place where cars can be kept.
下列场合可用螺栓来连接的说法错误的是()。
A、厚度不大的两零件
B、需要经常拆卸的两零件
C、一个厚度大一个厚度小的两零件
D、厚度不大也不拆卸的两零件