【多选题】下列游客购物时,导游人员应提醒游客坚持“五不要”的有( )。
【多选题】游客购物时,导游人员应提醒游客“五不要”的是
【单选题】Multiple sperm penetration of a mature egg is prevented by .
A.
molecular barriers secreted by the sperm
B.
cortical reaction of the egg
C.
lowering of intracellular pH
D.
degeneration of the fertilization membrane
【简答题】考虑用循环语句while去改写例5,要求将销售人员表中的姓名,性别和地址一次全部打在屏幕上,显示的结果如下:
【简答题】如何理解“幼儿学习游戏化”和“幼儿游戏课程化”
【简答题】The mainland of Australia is the largest ( ) and the smallest,flattest ( )on earth.
【简答题】9. The sperm whale
( , which , that , , who ) is a mammal, has the largest brain of any animal.
【简答题】A.Sperm, cells, DNA and other genes. B.Sperm, cells, DNA and other products. C.Sperm, organs, DNA and other genes. D.Sperm, organs, DNA and other products.
【单选题】下列描述错误的是( )
A.
圆雕是指用一块整体原料刻成一个具有完整独立的立体造型的实物形象
B.
群雕选料不限,雕刻方便,成品结构鲜明,层次感强,形象逼真,适合形体较大或比较复杂的物体形象雕刻,要求制作者具有广阔的想象空间,艺术构思与制作能力要强
C.
中国的食品雕刻在海外颇有影响,1987年,中国首次参加法国巴黎世界烹饪大赛就因食品雕刻而夺得金牌
D.
食品雕刻是一门综合艺术,是绘画、雕塑、插花、灯光、音乐以及书画等综合艺术的体现,用这些形态逼真、寓意深远的食品雕刻作品点缀菜肴、装饰席面,不仅有烘托主题、增添气氛的作用,还有赏心悦目、增加食欲的作用
【单选题】Girl sperm was preferred to boy sperm in the research most probably because ________.
A.
girl sperm contains more genetic material
B.
more mothers want to have girl babies
C.
girl sperm is healthier and more active
D.
girl sperm is more easily purified