国家税务总局实行不确定换版制度,从1986年到1987年我国进行了()换版工作。
A.两次
B.三次
C.四次
D.五次
参考答案:A
按给出的要求变换下列句子,要求每空限填一词。
1.She is going to play computer games tomorrow. (对画线部分提问)
________ she going to ________ tomorrow?
2. Where are you from? (改为同义句)
Where ________ you ________ from?
3. Shanghai is the biggest city in China. (改为含有比较的句子)
Shanghai is ________ than ________ other city in China.
4. My father drove his car to work yesterday. (改为同义句)
My father went to work ________ ________ yesterday.
5. People obey the traffic rules. There will be fewer accidents. (用if合并一个句子)
________ people obey the traffic rules, there ________ be fewer accidents.
环孢素的主要药理作用包括()
A.抑制活化的辅助性T细胞产生白细胞介素-2
B.抑制抗体的生产
C.抑制淋巴细胞生成干扰素
D.抑制巨噬细胞对抗原的处理和识别
E.促进B细胞的分化增殖