【单选题】We’ll have to finish the job, _____. A. long it takes however B. it takes however long C. however long it takes D. long however it takes A. Long it takes however B. it takes however long C. however long it takes D. long however it takes

__________, he always goes to swim in winter. A: However it is cold B: It is cold however C: However cold is it D: However cold it is

I’ll have to finish the job, . A: long it takes however B: it takes however long C: long however it takes D: however long it takes

面心立方、体心立方和密排六方的空间利用率分别为__________________。 A: 74%、74%、74% B: 68%、68%、68% C: 74%、68%、74% D: 68%、74%、68%

面心立方、体心立方和密排六方的配位数分别为 A: 74％、68％、74％ B: 68％、68%、68% C: 68％、74%、68% D: 74％、74%、74%

面心立方、体心立方和密排六方的致密度分别为()。 A: 68%、68%、68% B: 74%、68%、74% C: 68%、74%、68% D: 74%、74%、74%

体心立方（A2或BCC）、面心立方（A1或FCC）、密排六方（A3或HCP）晶体结构的致密度分别为（ ）。 A: 68%，74%，74% B: 74%，68%，68% C: 68%，68%，74% D: 74%，74%，68%

________, we won’t lose heart. A: No matter the difficulty may be B: However the difficulty may be C: However great the difficulty may be D: However may be the difficulty

However,resultsfromseveralsmallstudiesinhumanshaveyieldedinconclusiveevidenceofabeneficial_____ofascorbicacidonleadtoxicity.

68×5大约得（），因为68接近（），所以（）×5=（）