70t级铁路货车车钩支撑座与冲击座（B部）间隙不小于（）。 A.20_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

70t级铁路货车车钩支撑座与冲击座（B部）间隙不小于（）。

A.20mm

B.25mm

C.28mm

D.46mm

答案

参考答案：D

单项选择题 A1/A2型题

某女，36岁，右眼被飞溅的碎玻璃击中致伤1天。检查：全身情况尚可，右眼视力：手动，左眼视力：1.2；颞侧角膜可见贯通伤口。如果看不到异物，应对患者进行下列哪项检查（）。

A.X线检查

B.超声波检查

C.电生理检查

D.磁共振检查

E.眼压检查

填空题

Exercising to music pumps up brain power

If music makes you smarter, and exercise helps brain function, can exercising to music really boost brainpower Some researchers said it can. Volunteers who listened to Vivaldi’s "Four Seasons" while working out on a treadmill did much better on a test of (1) ability than when they exercised without music, a team (2) Ohio State University found.
"Evidence suggests that exercise improves the (3) performance of people with coronary artery (4) ," said psychologist Charles Emery, who led the study.
"And listening to music is (5) to enhance brainpower. We wanted to put the two results together," Emery (6) in a statement.
Writing in the latest issue of the journal Heart & Lung, Emery and (7) said they studied 33 men and women taking (8) in a cardiac rehabilitation program after having bypass (9) , angioplasty or other procedures to treat clogged arteries.
The (10) said they felt better emotionally and mentally after working out (11) or without the music. But their improvement on the (12) fluency test doubled after listening to music on the treadmills.
"Exercise seems to (13) positive changes in the nervous system, and these changes may have a (14) effect on cognitive ability," Emery said.
"Listening to music may (15) cognitive function through different pathways in the brain. The combination of music (16) exercise may stimulate and increase cognitive arousal (17) helping to organize cognitive output."
Emery said he now wanted to (18) people using music of their own choice. "We used the ’Four Seasons’ because of its (19) tempo and positive effects on medical patients in previous (20) ," Emery said. "But given the range of music preferences among patients, it’s especially important to evaluate the influence of other types of music on cognitive outcomes.\