就餐服务中遇到酗酒的客人劝解时，帮助介绍一些（）的青菜水果，也体现了周到服务。A、适

在一定条件下，PbO₂与Cr³⁺反应，产物是Cr₂O₇^2-和PbSO₄，则参加反应的Cr³⁺与PbO₂的个数之比为（   ）

A．1：3

B．2：3

C．1：1

D．4：3

语法填空（共10小题，每小题1.5分，满分15分）

阅读下面短文，根据上下文填入适当的词语，或使用括号中的词语的适当形式填空。

Chinese President Hu said before arriving in Pittsburgh ahead of the G20 summit, “To realize __1__ safer world for all, we must first and foremost remove the threat of nuclear war,” saying Beijing has always wanted complete __2___ (prohibit) and thorough destruction of nuclear weapons. Hu also said, “All countries should join the NPT (Nuclear Nonproliferation Treaty) and make real efforts to uphold and enhance its authority and __3__ (effective).” It was the third day when Hu had made a major speech before world leaders. __4__ was the first time that he __5__ (address) such a high-level summit on disarmament(解除武装) and nonproliferation(消除核扩散). Hu made five proposals in his speech, _6__ (say) all countries with nuclear weapons should publicly commit to not wanting to possess _7__ in the long term. Hu said China will consistently support nonproliferation and disarmament treaties. “We have adhered to(坚持) the policy of no-first-use of nuclear weapons at any time and __8__ any circumstance, and made the commitment that we will unconditionally not use or threaten to use nuclear weapons _9__ non-nuclear-weapon states or nuclear-weapon-free zones,” said Hu. The Chinese president said the function of the International Atomic Energy Agency should __10__ (strength).

女性，19岁。近2周来发热，体温38℃左右，伴恶心、呕吐、腹泻，遂出现心悸、胸痛、呼吸困难，晕厥发作。查体：面色苍白，精神萎靡，心率40次/分，律齐，心尖部第一心音低钝，且可闻及大炮音。临床诊断病毒性心肌炎。

最适宜的治疗措施为（）。

A.静脉注射阿托品

B.静脉滴注硝酸甘油

C.皮下注射肾上腺素

D.临时置入心脏起搏器

E.心脏复律

如何检测卤虫卵中是否混杂有泥沙？

任何一种教学评价方案的推出，都是评价主体根据学校的教学目标、评价对象的本质属性等来设计和制定的，都会影响大学的教学实践，引导着大学教学改革的（）。

A.效率

B.方向

C.原则

D.标准