【简答题】Whenever I am in (difficult) ______, he comes to help me.
【单选题】已知棱长为a,各面均为等边三角形的四面体S-ABC,则它的表面积等于( )
【单选题】He didn't give up _____ me. [ ]
【简答题】已知各面均为等边三角形的四面体的棱长为2,则它的表面积是 .(精确到0.1)
【简答题】已知各面均为等边三角形的四面体的棱长为2,则它的表面积是______.
【简答题】He says,“You are very nice to help me.” He says,“______ nice ______ you to help me.”
【简答题】‘Hemay help me.’ she said herself.A. in B. for C. by D. to
【简答题】He made a promise __________he would help me. A.what B.when C.that D.which