下列各项中,()是氯盐渍土的工程特性。
A.具有较强的吸湿性和保湿性
B.力学强度将随含盐量增大而降低
C.起始冻结温度随含盐量增加而降低
D.土中盐分易溶失
参考答案:A, C, D
经线为111°的子午线是6°带第()带的中央子午线。
A.17
B.18
C.19
D.20
Recently some studies have found that learning ____________ second language can lead to _______________ increase in one’s brain power.
A.a; the
B.不填; the
C.a; an
D.the; an