1873—1910年，我国农产品出口总值呈不断上升的趋势。促成这种趋

【名词&注释】

重症肌无力(myasthenia gravis)、神经递质(neurotransmitter)、过敏反应(allergic reaction)、世界市场(world market)、常春藤(ivy)、病原体(pathogen)、百合科(liliaceae)、自然经济(natural economy)、爬山虎(boston ivy)、农产品商品化(commercialization of agricultural produ ...)

[单选题]1873—1910年，我国农产品出口总值呈不断上升的趋势。促成这种趋势的因素不包括

A. 列强对华经济掠夺加强
B. 农产品商品化^{(commercialization of agricultural produ)}程度提高
C. 自然经济^{(natural economy)}进一步发展
D. 世界市场最终形成

查看答案&解析

举一反三：

[单选题]葡萄科的爬山虎^{(boston ivy)}和五加科的常春藤攀墙而上，二者攀援所依靠的器官为( )。

A. 均为茎卷须
B. 均为气生根
C. 分别为气生根、茎卷须
D. 分别为茎卷须、气生根

[单选题]The computer was used in teaching. As a result, not only _________, but students became more interested in the lessons.

A. saved was teachers' energy
B. was teachers' energy saved
C. teachers' energy was saved
D. was saved teachers' energy

[单选题]烟草(Nicotiana tabacum)全株含尼古丁，有剧毒。( )

A. 正确
B. 错误

[单选题]What is the woman trying to do?

A. Finish some writing.
B. Print an article.
C. Find a newspaper,

[单选题]百合科^(liliaceae)(Liliaceae)与石蒜科(Amaryllidaceae)的主要区别在于后者子房下位。( )

A. 正确
B. 错误

[单选题]39______

A. turn
B. kick
C. jump
D. speak

[单选题]According to the passage, the issue to offer free tickets to young people seems ______.

A. controversial
B. inspiring
C. exciting
D. unreasonable

[单选题]重症肌无力患者由于体内存在某种抗体，该抗体与神经-肌肉突触的受体特异性结合，使该受体失去功能，最终导致

A. 刺激神经不能引起肌肉收缩
B. B 全身出现性过敏反应
C. 肌肉对神经递质的反应性提高
D. D 机体对病原体的反应能力提高

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