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【单选题】
β受体阻断药诱发加重哮喘的原因是A.
促进组胺释放
B.
阻断β受体,引起支气管平滑肌收缩
C.
拟胆碱作用
D.
拟组胺作用
E.
阻断α受体
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举一反三
【判断题】The writing system of a language is always a later invention used to record speech,thus there are still many languages in today's have no .... ()
A.
正确
B.
错误
【单选题】Which writing system does Japanese belong to?
A.
word writing
B.
syllabic writing
C.
alphabetical writing
D.
picture writing
【简答题】The writing system of English is known as the sound writing system while that of Japanese as ______ writing system.
【单选题】Which of the following statements is true about the Chinese writing system?
A.
The Chinese writing system does not represent sound.
B.
The Chinese writing system represents primarily the sound.
C.
The Chinese writing system represents primarily the meaning, and sometimes secondarily the sound.
【简答题】In the sound writing system, the reference of the grapheme is the phoneme.
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