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【单选题】
They ____ through the woods talking about the current affairs.A.
wandered
B.
strayed
C.
rambled
D.
wondered
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反馈参考答案：
举一反三
【单选题】What was the author's purpose when writing this passage?
A.
To discuss different methods of pruning.
B.
To introduce some common knowledge of pruning.
C.
To explain how trees develop disease.
D.
To give practical instruction for pruning a tree.
【单选题】Section B Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you ...
A.
A comparison between the poorest countries and richest countries.
B.
An aid for health care to developing countries.
C.
The relationship between health care and economic growth.
D.
The investment in developing countries.
【单选题】下列物质中能用氢氧化钠标准溶液直接滴定的是（ ）[Ka（苯酚＝1.1×10-10）；Kb（NH3）＝1.8×10-5；Ka（HAc）＝1.8×10-5；草酸：Ka1＝5.9×10-2，
A.
苯酚
B.
氯化氨
C.
醋酸钠
D.
草酸
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