甲在丈夫的水杯中投毒，意图杀害丈夫，丈夫中毒后呕吐不止，甲见状不忍，将丈夫送到医院，

患者因车祸，胸部受伤，时时刺痛，痛处固定，伴有心悸失眠，急躁易怒，舌质暗红，边尖有瘀点，脉弦涩，治疗应首选的方剂是（）

A.桃核承气汤

B.补阳还五汤

C.血府逐瘀汤

D.通窍活血汤

E.复元活血汤

X、Y、Z、W均为短周期元素，它们在周期表中相对位置如图所示.若Y原子的最外层电子数是内层电子数的3倍，下列说法中正确的是：

A．只由这四种元素不能组成有机化合物

B．最高价氧化物对应水化物的酸性W比Z弱

C．Z的单质与氢气反应较Y剧烈

D．X、Y形成的化合物都易溶于水

_____ we choose healthy food for our main meals, we probably still need to exercise now and then.

A．Unless

B．As though

C．Until

D．Even if

Three-fourths of the buildings _____ in the earthquake. [ ]

A. was destroyed

B. is destroyed

C. were destroyed

D. have destroyed

道德的本性是？（）

A、纯粹恶

B、目的善

C、必要恶

D、外在善