听力原文: NASA officials say, on Wednesday, one of three sensors (传感器) on Columbia's left-hand landing gear possibly indicated the device had begun to deploy (展开;配置) 30 seconds before all contact was lost with the shuttle. The new information surfaced as NASA officials were working on the latest version of the timeline covering exactly what happened before Columbia and its crew was lost on Feb. Previous timelines released by NASA and showed a number of sensors in and around the left wing were failing off or indicating a heating trend beginning eight minutes before the contact was lost.
According to the news, the American space shuttle Columbia failed
A.on Jan. 3rd.
B.on Feb. 1st.
C.on Mar. 4th.
D.on Jan. 2nd.
第1题
冠心病心绞痛患者至少有1支冠状动脉的管腔直径减少多少
A.≥50%
B.≥70%
C.≥90%
D.≥30%
E.≥60%
第2题
冠心病心绞痛患者至少有1支冠状动脉的管腔直径减少
A.>50%
B.≥70%
C.>30%
D.>90%
第4题
冠心病心绞痛患者至少有1支冠状动脉的管腔直径减少:
A.≥50%
B.≥70%
C.≥90%
D.≥30%
E.≥60%
第9题
冠心病心绞痛患者至少有一冠状动脉的主支管腔显著狭窄,达横切面积的
A.35%以上
B.50%以上
C.70%~75%以上
D.80%以上
E.90%以上
第10题
冠心病心绞痛患者至少有1个冠状动脉的主支管腔显著狭窄达横切面积的
A.50%以上
B.75%以上
C.80%以上
D.90%以上
E.95%以上
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!