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【单选题】
关于静脉回心血量及其影响因素的叙述,错误的是A.
体循环平均充盈压降低，静脉回心血量减少
B.
右心衰竭时回心血量大大减少
C.
长久站立不动，也会导致回心血量减少
D.
肌肉维持在紧张收缩状态时，静脉回流会增加
E.
深吸气时使回心血量增加
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举一反三
【简答题】The______(expand)of the factory made room for more equipment.
【单选题】Because the company was doing more business, it was necessaryto the factory .
A.
extend
B.
increase
C.
rise
D.
grow
【单选题】The factory has introduced modern , with the workers can work more efficiently.
A.
equipment; which
B.
equipment; it
C.
equipment s ; which
D.
equipment s ; them
【单选题】现有四个化学反应,在标准状态下,反应的自由能变化分别为 Δ r G m θ (1) , Δ r G m θ (2) , Δ r G m θ (3) , Δ r G m θ (4) ,且有 Δ r G m θ (1)=Δ r G m θ (2)-Δ r G m θ (3)+2Δ r G m θ (4) ,则这四个反应的平衡常数之间的关系为 。
A.
K 1 θ =K 2 θ ·(K 4 θ ) 2 ／ K 3 θ
B.
K 1 θ =K 2 θ -K 3 θ +2K 4 θ
C.
K 1 θ =2K 2 θ ·K 3 θ ／ K 4 θ
D.
lnK 1 θ =(K 2 θ -K 3 θ +2K 4 θ )
【单选题】The workers of the factory were string for more ____
A.
wages
B.
salary
C.
economics
D.
economy
【单选题】More and more automatic machines ______, the output of the factory that manufactured electronic equipment increased tremendously.
A.
using
B.
having used
C.
having been used
D.
to have been used
相关题目：
【单选题】The workers of the factory were string for more ____
A.
wages
B.
salary
C.
economics
D.
economy