属于常染色体显性遗传的疾病有()
A.软骨发育不全
B.颅锁骨发育不全
C.皮肤骨膜肥厚症
D.马方(Marfan)综合征
E.重型石骨症
参考答案:A, B, C, D
—How about ________ job you were offered last week?
—Not so bad, but I ran into difficulties at the very beginning.
A.the
B.an
C.a
D.不填
防雷装置主要由()、()和()三部分组成。