哥哥今年20岁，体重2000克．______．（判断对错）
由分析可知：哥哥今年20岁，体重应是40千克左右，
所以题干的说法错误；
故答案为：×．
When they had cleaned their bowls in this way, they would sit __________ at the pot with eager eyes, as if they wanted to eat it.
A．stared
B．staring
C．to stare
D．stares
离心泵启动前应将泵灌满液体，且关闭（），以防倒灌。
A、入口阀
B、出口阀
C、进口和出口阀
