Exploring space is exciting, yet dangerous. There is need for both robots

Exploring ________space is exciting, yet dangerous. There is ________need for both robots and humans for space exploration.

A. the; a B. a; a C. /; a D. /; the

答案

相关题目

阅读下面的文言文，完成下题。章频，字简之，建州浦城人

阅读下面的文言文，完成下题。章频，字简之，建州浦城人。与弟頔皆以进士试礼部预选，会诏兄弟毋并举，频即推其弟，弃去。后六年，乃擢第。自

下表为人体四种细胞某些基因表达的结果，下列相关叙述正

下表为人体四种细胞某些基因表达的结果，下列相关叙述正确的是（）细胞名称肝细胞幼嫩红细胞造血干细胞浆细胞 mRNAmRNA1mRNA2mRNA3mRNA4 蛋白

汶川地震发生后，为了及时发布余震警报，技术人员设计了

汶川地震发生后，为了及时发布余震警报，技术人员设计了一个简单的报警器电路图，满足下列哪个条件，该报警器将发出警报声（） A．S1断开

某同学在做“利用单摆测重力加速度”的实验中，先测得摆

某同学在做“利用单摆测重力加速度”的实验中，先测得摆线长为101.00cm，摆球直径为2.00cm，然后用秒表记录了单摆振动50次所用的时间为101.5 s。则：

某地举行一次足球单循环比赛，每一个球队都和其他球队进

某地举行一次足球单循环比赛，每一个球队都和其他球队进行一场比赛，共进行了55场比赛，如果设有个球队，根据题意列出方程为（） A. B.

完形填空Last Sunday was fine, Mike 1 stay at home. He was on a �

完形填空Last Sunday was fine, Mike 1 stay at home. He was on a 2 to the zoo. A woman with a baby got on the bus. Mike stood up and 3 to her, “Come and sit her

It was quiet for a long time, when ______ the baby started to cry. A. all of

It was quiet for a long time, when ______ the baby started to cry. A. all of suddenly B. all of sudden C. all of at once D. all of a sudden

---Excuse me, could you please tell me ______ my car? --- Sure. Park it right

---Excuse me, could you please tell me ______ my car? --- Sure. Park it right ahead. I’ll help you. A. where to park B. where to stop C. how to stop

Exploring ________space is exciting, yet dangerous. There is ________need for both robots

答案

相关题目

最新题目

Exploring space is exciting, yet dangerous. There is need for both robots