Sottos and her fellow scientists still have 65 work to do before the color-changing molecules can be used outside the lab.
51. A.measures B.accidents C.actions D.collapses
52. A.they B.it C.some D.most
53. A.with B.over C.at D.in
54. A.before B.after C.once D.while
55. A.together B.behind C.down D.apart
56. A.contacting B.conducting C.containing D.considering
57. A.controlled B.spotted C.repaired D.changed
58. A.technical B.electronic C.physical D.chemical
59. A.everything B.something C.nothing D.anything
60. A.weak B.strong C.tough D.soft
61. A.using B.opening C.turning D.finishing
62. A.laws B.theories C.tools D.results
63. A.air B.electricity C.light D.sound
64. A.aside B.beside C.inside D.outside
65. A.a part of B.a pair of C.a piece of D.a lot of
参考答案DCDAC CACBD CABBD
ACCACAC
BAFDAFBD
DADCA DABCA DAADC
ADFCB
BACAD CBDAA BDCDD
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