甲乙双方签订买卖合同，由甲方卖给乙方一辆卡车。乙方为有字号的个人合伙。下述判断哪项是

男性，21岁。患急性淋巴细胞性白血病，壮热口渴，头痛面赤，咽喉肿痛，时有鼻衄，便秘，舌红绛，苔黄，脉洪大，其证型是

A．阴虚火旺
B．气阴两虚
C．热毒炽盛
D．痰热瘀阻
E．肝火上炎

视神经脊髓炎不会转变为典型的多发性硬化()

---Must we leave the classroom now?

---No, you _____. You _____ leave after the bell rings.

A．mustn't; are allowed to

B．don't have to; might

C．needn't; can

D．can't; are supposed to

—Do you know Li Na?

—Of course. She's a great tennis player_________ comes from Hubei, China.

A. who B. what C. which

下面有关临界温度的说法正确的是（）。

A.每种纯气体物质都有相应的临界温度

B.氦气是没有临界温度的气体

C.只有将纯气体的温度降至临界温度，加大压强才能使其液化

D.当纯气体的温度在临界温度以上时，加大压强可以使其液化