浅冷装置工艺操作中,原料气中()组分含量越高,在同样的操作条件下,轻烃回收率越高。
A.C3以上
B.C1~C2
C.C2~C3
D.C1~C5
参考答案:A
按《素问.举痛论》所述,“喜”所致病证有()。
A.营卫通利
B.癫
C.狂
D.痴呆
E.全身乏力
After 1953 _______ people have succeeded in climbing the mountain.
A.several hundred of
B.several hundreds
C.several hundreds of
D.several hundred