单项选择题

曲线与 x轴所围成的图形的面积为 A.
B.
C.
D.

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单项选择题

Part 3. Cloze Test. (40 points, 2 points each) Many students find the experience of attending university lectures to be a confusing and frustrating experience. The lecturer speaks for one or two hours, perhaps __31__ the talk with slides, writing up important information on the blackboard, __32__ reading material and giving out __33__.The new student sees the other students continuously writing on notebooks and __34__ what to write. Very often the student leaves the lecture __35__ notes which do not catch the main points and __36__ become hard even for the __37__ to understand. Most institutions provide courses which __38__ new students to develop the skills they need to be __39__ listeners and note-takers. __40__ these are unavailable, there are many useful study-skills guides which __41__ learners to practice these skills __42__. In all cases it is important to __43__ the problem __44__ actually starting your studies. It is important to __45__ that most students have difficulty in acquiring the language skills __46__ in college study. One way of __47__ these difficulties is to attend the language and study-skills classes which most institutions provide throughout the __48__ year. Another basic __49__ is to find a study partner __50__ it is possible to identify difficulties, exchange ideas and provide support. A、what B、those C、as D、which

单项选择题

家畜出生后，有一侧或两侧睾丸没有下降到阴囊中仍留在腹腔内，称为单睾或隐睾。（）

A．对
B．错

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