Why is the space statioreluctant to receive more paying tourists according to Frank Culbertson( ) ·Because the space statioisn’t big enough for the paying tourists. ·Because as a place for doing research, the statoshould be highly efficient. ·Because a paying tourist may be ignorant of the space research work. ·Because the paying tourists have to pay too much to gaispace experience.
答案是:单选题 ·Because as a place for doing research, the staton should be highly efficient.
