婴儿腹泻重度脱水的主要诊断依据是
A．眼窝前囟明显凹陷
B．皮肤弹性差
C．哭时泪少，尿量明显减少
D．精神萎靡
E．外周循环衰竭
参考答案：E
We had estimated the number of visitors to our school’s hundredth anniversary at about 400, but the __________ number was much higher.
A．actual
B．genuine
C．sincere
D．unbelievable
平原河流在水流和河床相互作用下，河槽中往往形成各种形状的（）。
A.沙滩
B.冲沟
C.堆积物
D.河心滩
