中度精神发育迟滞的IQ值范围为()。
A.55~69
B.45~59
C.35~49
D.25~39
E.<25
参考答案:C
(2分)中国新建发射卫星发射基地位于海南省文昌市,原因是: 。
The pilot asked all the passengers on board to remain _________ as the plane was making a landing.
A.seat
B.seating
C.seated
D.to be seating