[单选题]以下不属于镍氢电池的优点的是( )。 (1.0分)
A.A、工作电压高
B.B、比能量高
C.C、循环寿命长
D.D、安全性高

American are careful about how and when they meet one another’s eyes. In their normal conversation, each eye (61) lasts only about a second before one or both individuals (62) . When two Americans look (63) into each other’s eyes, emotions are heightened and the relationship becomes more (64) . (65) , they carefully avoid this, except in appropriate circumstances.
Proper street behavior in the United States (66) a nice balance of attention and (67) . You are supposed to look at a passer-by just enough to show that you (68) his presence. If you look too (69) , you appear arrogant or secretive; too much and you’re (70) . Usually what happens is that people eye each other (71) they are about eight feet apart, at which point both cast down their eyes. In England the polite listener stares at the speaker (72) and blinks his eyes occasionally as a sign of interest. That (73)
A. lonely
B. curious
C. hostile
D. close