Which can be inferred from the first paragraph?
A. The quest for wisdom is an old-fashioned economic indicator.
B. When things proceed smoothly, people don"t need to go searching for wisdom.
C. Billionaires listed on the Forbes are demonstrating the profits of free market.
D. In the long run, all the wealthiest individuals will confess their ignorance.
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焊嘴头被堵塞时,可将嘴头与平板摩擦,也可用通针清理,以消除堵塞物。()
The word "rightly" (Para. 5) can be best replaced by _____.
A. justly
B. understandably
C. evidently
D. appropriately
The word "malleable" (Line 6, Paragraph 5) is closest in meaning to
A. miserable.
B. adaptable.
C. vulnerable.
D. active.
露天爆破按一次爆破炸药量和装药方式的不同可分为:深孔爆破、浅孔爆破、药室爆破、裸露药包爆破以及临近边坡控制爆破等。()