单项选择题 Placing a job advertisement on an online job board is().A、 expensivelyB、 costlyC、 cost

单项选择题 Would you like to go to attend the conference on global warming with me? (). but I should finish my homework first.A、 It’s hard to sayB、 You’re welcomeC、 I’d love to

单项选择题 住宅厨房与卫生间的门如不设固定百页，应留有一定进风措施，门下距地留出的缝隙不小于：