电脑加油机的计量器，把油品依次进入每个缸的部件是（）。
A.活塞
B.分配阀
C.滚子
D.进油管
参考答案：B
Leaders of the BRIC countries-----Brazil, Russia, India and China----_______their second summit on Friday. President Hu Jintao then returned home to help direct relief work ______the deadly earthquake in Qinhai.
A．left, to follow
B．concluded, following
C．had left, following
D．had concluded, followed
不是垂体分泌的促激素的是（）
A.促甲状腺激素
B.促肾上腺皮质激素
C.催乳素
D.黄体生成素
E.卵泡刺激素
