师生关系

命题“等角的余角相等”写成“如果…，那么…”的形式（    ）．

化学清洗的常用方法是什么？

如图（a）（b）所示，（a）说明：力能改变物体的_______；（b）说明：力能改变物体的_______。

China is to send its top negotiator on North Korea’s nuclear program to Pyongyang (36) amid international concern over the launch of (37) .
While the (38) and its ally Japan push for (39) against North Korea, China is (40) , not sanctions.
Also, the (41) to Japan says sanctions on North Korea will (42) efforts to bring the secluded state back to (43) on its nuclear program.
North Korea (44) the six-party talks in (45) after Washington imposed financial sanctions for alleged counterfeiting and (46) activities.
A broadcast on North Korean State Television (47) the missile tests, in what it called a "successful (48) ".
It said North Korea will take action against anyone who (49) them.
The Minister is reported to have told a (50) that the missile launches were (51) because of America’s sanctions against Pyongyang.
North Korea remains (52) in the face of international condemnation and has warned (53) could be carried out.
UN Security Council members will (54) discussions tonight on whether a (55) condemning the missile launches should call for sanctions.

对于特殊林木，承包期限可以延长，但是须经( )批准。

A．国务院发改委
B．国务院农业主管部门
C．国务院
D．国务院林业行政主管部门