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【简答题】
原子吸收分光光度分析法的主要特点是______、______、______、______等，可以测定______种元素，主要为______元素。
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】I'm sorry we cannot help you this time, but we hope to see you another occasion.
A.
并列复杂句
B.
简单句
C.
复杂句
D.
并列句
【单选题】听力原文：M: I would like to make a reservation for dinner for four tonight. W: I'm sorry, Sir. We don't take reservations on weekends. Q: What does the woman mean? (13)
A.
They should have called earlier in the day.
B.
They cannot reserve a table in advance.
C.
The restaurant has no room for more diners tonight.
D.
The restaurant is closed this weekend.
【简答题】I'm sorry, since it has been served according to your order, I'm afraid we cannot replace it with Mapo Tofu for you, unless you agree to bear the extra expense.
【单选题】Customer 1: We've been here for 10 minutes, but we don't have the menu, yet. Waiter: I'm terribly sorry, Madam. ______
A.
We are too busy to serve you today.
B.
I'll be with you right away.
C.
I cannot find the menu.
D.
The manager deals with complaints.
【多选题】下列属于常见的外部效度威胁因素的有（ ）
A.
测试关联：在测后实验之前进行相关度比较高的测前测试可能会使被试对实验更加熟悉和敏感，从而提高测试成绩。
B.
测量手段：在实验中用到的各种手段工具会影响测试结果。
C.
样本不具代表性：作为样本的被试不能代表母体的情况。
D.
需求特性：被试在参与实验时很自然地去猜测实验者到底想要检验什么，在试验中能引导被试作出猜测的线索被称为需求特性。
【简答题】槽轮机构是由机架、带圆销的曲柄和具有径向槽的槽轮组成,曲柄是 件,并作连续 ,槽轮是 ,则作 的间歇运动。
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