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【判断题】
原癌基因实质上是人或动物基因组中一类固有的正常的结构基因。A.
正确
B.
错误
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【判断题】The difference of sinology and Chinese Studies is that sinology is about Chinese economy and Chinese studies is the research on Chinese culture.
A.
正确
B.
错误
【单选题】关于抗体的产生分布、特性和作用等的叙述中，错误的是（）
A.
抗体主要分布在血清中
B.
抗体都能被蛋白酶分解
C.
抗体和抗原能发生特异性结合
D.
抗体主要在细胞免疫中发挥作用
【判断题】Sinology and National Studies are different because sinology is the study of China by Chinese and National Studies is the study by foreign scholars.
A.
正确
B.
错误
【判断题】Sinology contains courtesy, music, archery, calligraphy, mathenatics, and also classical Chinese philosophy. So, English lessons are not providedin today's sinology schools.
A.
正确
B.
错误
【判断题】⑶In Sinology schools, students receive systematic training in sinology. They would also learn math and English lessons.
A.
正确
B.
错误
【单选题】A solution contains 15 g Na 2 CO 3 and 235 g of H 2 O? What is the mass % of the solution?
A.
15% Na 2 CO 3
B.
6.4% Na 2 CO 3
C.
6.0% Na 2 CO 3
D.
5.0% Na 2 CO 3
【简答题】为了测定一光栅的光栅常数，用波长为632.8nm的激光垂直照射光栅，做光栅的衍射光谱实验。已知第1级亮条纹出现在【图片】的方向上，则1cm内有 条缝。
【简答题】阅读理解 The human brain contains 10 thousand million cells and each of these may have a thousand connections. Such enormous numbers used to discourage us and ease us to dismiss the possibility of ...
【单选题】为了测定一光栅的光栅常数,用波长632.8nm 的氦氖激光垂直照射光栅,作光栅的衍射光谱实验。已知第一级谱线的衍射角 30度 ,求光栅常数 d=__________________nm .
A.
1265.6nm
B.
632.8 nm
C.
316.4nm
D.
无法确定
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