_________[A] subsequently[B] presently[C] previously[D] lately

（1）a＋18=______＋______　　　a×15=______×______（2）m×2.5×0.4=______×（______×______）（3）（a＋b）×C=______×_____

（a＋b）×c=______？______＋______？______，这是应用了______．

当A域信任B域的委托关系建立后，A域是_______，B域是_______。

According to the conversation, an example of "Christmas trimmings" could be______.A．presen

向量a，b互相垂直，且 ，则a？（a＋b)=__________

The purpose of this test is to measure students‘__________to learn instead of their presen