下列药物可使茶碱类、咖啡因和口服抗凝血药血药浓度升高的是（） A.磺胺嘧啶 B.青霉

下列食物链中，正确的一项是（    ）

A．阳光→草→鼠→蛇→鹰

B．草→鼠→猫头鹰→细菌、真菌

C．食虫鸟→昆虫→草

D．草→兔→狐

引起病毒性脑膜炎、脑炎最常见的病毒是（）

A.虫媒病毒

B.腮腺炎病毒

C.疱疹病毒

D.流感病毒

E.肠道病毒

调度员潮流通常采用哪些潮流算法？其特点如何？

When preparing to give a child with insulin-dependent diabetes his dose of regular and NPH humulin insulin, which of the following actions would be most appropriate

A．Taking the premixed insulin out of the refrigerator, then withdrawing the amount into in one syringe.

B．Using two syringes, one for each type of insulin, and giving two injections.

C．Withdrawing the NPH insulin first, then withdrawing the regular insulin into one syringe.

D．Withdrawing the regular insulin first, then withdrawing the NPH insulin into one syringe.

教育科研论文的学术性具体体现在两个方面：一是（），二是（）。