酸式滴定管适用于装酸性和中性溶液，不适宜装碱性溶液，因为（）。
参考答案：玻璃活塞易被碱性溶液腐蚀
变压器常见的不正常状态是（）。
A.线圈的相间短路
B.匝间短路
C.单相接地短路
D.过电流，温升过高
- Many people are worried that so many college graduates each year can't find a job.
-_______is no need to worry about it as the government is now making every _______to provide more jobs.
A．It; effort
B．It; measure
C．There; effort
D．There; effect
