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【单选题】
山梨酸类的适用pH值范围为A.
pH 2.0～4
B.
pH5.5以下
C.
pH4-8
D.
pH 7-9
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举一反三
【简答题】即兴讲话具有哪些特点?
【简答题】一质量为 m 的物体悬于一条轻绳的一端,绳另一端绕在一轮轴的轴上,如图所示。轴水平且垂直于轮轴面,其半径为 R ,整个装置架在光滑的固定轴承之上,当物体从静止释放后,在时间 t 内下降了一段距离 s ,试求整个轮轴的转动惯量 ( 用 m 、 R 、 t 和 s 表示 ) 。
【单选题】Which statement about the differences of news headlines between Chinese and English is correct?
A.
Many sorts of punctuation can be seen in both English and Chinese headlines and even in English ones. Comma is always used to replace the word “and” in order to save space.
B.
In English headlines, active voice is less frequently seen than passive voice.
C.
Tense in Chinese headlines is evident but more invisible in English ones. In particular, Chinese headlines usually avoid the past tense.
D.
Chinese headlines seldom have subjects and often have no articles. English versions have to keep the subject and add articles.
【单选题】Which of the following is INCORRECT?
A.
Technical degrees are not designed for transfer.
B.
The associate degree usually takes about two years to complete.
C.
The associate's is normally required before one can work at the bachelor's level.
D.
The associate degree may replace the first two years of a bachelor's degree.
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