A:1
B:2
C:3
D:4
如图所示,倾角为θ的斜面体C置于水平地面上,小物块B置于斜面上,通过细绳跨过光滑的定滑轮与物体A相连接,连接B的一段细绳与斜面平行,已知A、B、C都处于静止状态,则( )
点拨:Volunteering our time to help these people是动名词短语,在句子中作主语,谓语动词用单数形式。如:
Helping others ____ (make) me feel happy.
Look at this mail-order advertisement:
SUNSHINE COMPANY
Products for a Safe Environment
A2477-HAND SOAP (肥皂)
You're going to love this natural soap. There are no chemicals in it. It is very good for your hands and face.
D4545-GARDEN SPRAY(喷雾剂)
Insects(昆虫) are going to run away from our new chili garlic spray. It's safe and natural.
B2377-HOME CLEANER(清洁剂)
You're not going to need 5 or 6 chemical cleaners. You have Dr Clean! It is safe and strong, and it cleans everything in your house!
A2104-CANVAS BAG (帆布包)
You're going to say, "No paper or plastic!" You have this excellent heavy canvas shopping bag.
Item
Code(代码)
Price
Code
Hand soap
A2477
$1.00
Garden spray
D4545
$2.50
Home cleaner
B2377
$2.25
Canvas bag
A2104
$4.00
Postage(邮费): $3.50
根据句意及首字母或汉语提示完成单词。