当采用逐级限速方法时,逐级限速宜每()m降低10km/h。相邻限速标志间距不宜小于()m。
A、100 200
B、100 100
C、200 100
D、200 200
参考答案:A
The Spring Festival is our traditional festival, __________ people usually visit their friends and relatives.
A.for which
B.to which
C.during which
D.about which
胆汁酸合成的限速酶是()。
A.1—α—羟化酶
B.12—α—羟化酶
C.HMGCoA还原酶
D.HMGCoA合酶
E.7—α—羟化酶