有一个人的环保和消防意识很差，家里的煤气用完后，他把煤气瓶中的废液倒到住宿楼旁的

急性根尖周脓肿时，对根尖周组织破坏最小的排脓途径是（）

A.通过根管从龋洞排出

B.向鼻腔内排出

C.穿通牙槽骨至粘膜下

D.穿通牙槽骨至皮下

E.由龈沟或牙周袋排出

阅读下面短文并回答问题，然后将答案写到答题卡相应的位詈卜（请注意问题后的词数要求）。

[ l ]On the 15th of each month, a classroom at Pointers Run Elementary School in Maryland is packed with volunteers Students like Campbell Snoddy collect food         ____________by students, parents and teachers from each classroom．Then, the children check to make sure the food isn't too old．After that, they sort it by category and put the cans and boxes into bags to be delivered to low -income senior citizens in the community．

[ 2 ] “I wanted to teach my daughter about charity．” says Julie Rosenthal, Who started the nonprofit program six years ago． "And I wanted to teach other kids in the community, too．"

[ 3] Children make their deliveries around the 15th of the month when money from monthly Social

Security checks begins to run out and tough decisions between food and other needs have to be made．

[4 ] "I am on a fixed income and the food has helped me out considerably," says Linda Testennan, a food receiver．

[5 ] “ It was really fun, and it was great to make the senior citizens happy,” says Campbell． “ It was really cool．”

[6 ] Sofia Merkowitz, another Food on the 15th volunteer, agrees．"I really liked it because it made me feel really good that people were so happy that they got food．"

[7]Rosenthal says that is why she has children do more than fill a bag with donated food．        

[8 ] "We want the children to have firsthand experience delivering the food to the people so that they can get that feeling of really making a difference in somebody’s life, a positive difference．"

[ 9] The program started with one school delivering 30 bags of groceries． It has grown each year, and now involves 10 schools and several churches．Food on the 15th has delivered more than12, 000 bags so far．Rosenthal's goal is to expand Food on the 15th across the country and around the world．

小题1:What is the passage mainly talking about? （no more than 10 words）

小题2:List three things that the students do with the food in the program "Food on the 15th" （ no more than 20 words）

小题3:Fill in the blank in the first paragraph with proper words to complete the sentence．（ no more than 3 words）

小题4:On what purpose did Julie Rosenthal start the non - profit program? （ no more than 15 words）

小题5:What does the underlined word "it"  in Para 5 probably mean? （ no more than 6 words）

穿管敷设的铝芯绝缘导线最小截面不低于。（）

A.1.0mm²

B.2.5mm²

C.4mm²

D.6mm²

读两地区示意图，判断下列问题。

两图中河流的共同点是（）

A.都有冰期

B.都有春汛和夏汛

C.都发源于“三江源”地区

D.都以雨水补给为主

加氢催化剂再生工艺流程分脱油、再生、冷却三部分，且再生时，温度不宜超过500℃。