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【单选题】
符合-比尔定律的溶液，用 1 cm 吸收池，测得透射比为 80%，若用 5 cm 吸收池，则其透射比为A.
33%
B.
16%
C.
40%
D.
67%
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举一反三
【单选题】What is Friday's opportunity cost of producing one coconut? What is Friday's opportunity cost of producing 1 fish?
A.
The opportunity cost of one coconut is two fish. The opportunity cost of one fish is thirty coconuts.
B.
The opportunity cost of one coconut is thirty fish. The opportunity cost of one fish is two coconuts.
C.
The opportunity cost of one coconut is 1/15 fish. The opportunity cost of one fish is fifteen coconuts.
D.
The opportunity cost of one coconut is fifteen fish. The opportunity cost of one fish is two coconuts.
【单选题】The phrase' a great opportunity' mentioned in the last paragraph refers to an opportunity to ______
A.
carry out reform
B.
boom economy
C.
animate the voters
D.
attack chief executive
【单选题】That should be an excellent opportunity of you to say what you think.
A.
opportunity for you
B.
opportunity in which you are
C.
opportunity to you
D.
opportunity in which you
【单选题】国家对进口可用作原料的固体废物的国内收货人及国外供货商实行注册登记制度,向中国出口可用作原料的固体废物的国外供货商。应当取得( )颁发的注册登记证书。
A.
商务部
B.
环保部
C.
海关总署
D.
国家质检总局
【单选题】法约尔的六大基本活动中,“管理性活动”是指( )
A.
货物盘点，成本统计和核算
B.
设备的维护和人员的保护
C.
采购、销售和交换
D.
计划、组织、指挥、协调和控制
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