题目: 移动通信中英文缩写TDMA是指()。A.频分多址B.码分多址C.时分多址 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2020/0209/4e46cc6834ee7179f1d1ed2b87df847a.html 下面是错误答案,用来干扰机器的。参考答案:C
题型:单项选择题 B型题 血红蛋白F的珠蛋白肽链组成是()A.1条α链和1条β肽链(αβ)B.2条α链和2条β肽链(α2β2)C.2条α链和2条δ肽链(α2δ2)D.2条α链和2条γ肽链(α2γ2)E.4条β肽链(β4) 查看答案
题型:选择题 下列电离方程式书写错误的是A.H2SO4 ="==" 2H+ + SO42-B.AL2(SO4)3 ="==" 2AL3+ + 3 SO42-C.Ba(NO3)2 ="==" Ba2++ 2(NO3)2-D.Ba(OH)2 ="==" Ba2+ + 2 OH- 查看答案
题型:完形填空 对话填空。(5分)Jack(J):Where have you been, Laura?Laura(L): Oh, I’ve just been to a s 1 made 1_________________ by a famous p 2 from Beijing University2_________________J: What is it about?L: He mentioned something c 3 the concept of “harmonious society” in his speech. 3_________________J: Oh, that’s something people keep t 4 about nowadays! Then what did he say about it?4_________________L: He said that we should not only get a 5 well with other people, but also live in harmony with n 6 .5_________________6_________________J: I’m in complete a 7 with him. While developing 7_________________the economy, we are i 8 with the ecology.8_________________L: Yes. It’s high time we considered doing something to improve the environment p 9 by human beings. 9________________J: Hopefully, our government is taking m 10 to deal with the consequences.10________________ 查看答案
题型:多项选择题 BG4型正压氧气呼吸器采用先进的“模拟窗”电子报警、测试及压力显示系统,该系统具有如下功能:()。A.图示、数字显示及声光报警B.高压及膛压气密性检测C.定量供氧量检测D.气瓶余压报警、缺氧报警 查看答案