题目

如图，点O在直线AB上，∠AOC=∠DOE=90° （1） 图中除∠AOC，∠DOE外还有哪个角是直角？请写出计算过程. （2） 若OE是∠BOC的角平分线，求∠BOE，∠AOD的度数 答案：解：∵AB是直线，∠AOC=90° ∴∠BOC=180°-∠AOC=180°-90°=90° ∴∠BOC是直角 由（1）得∠BOC=90° ∵OE是∠BOC的平分线， ∴∠BOE=12∠BOC=12×90°=45°. ∵∠DOE=90° ∴∠BOD=∠DOE-∠BOE=90°-45°=45° ∴∠AOD=180°-∠BOD=180°-45°=135° 完型填空 　　Scott and his companions were terribly disappointed．When they got to the South Pole, they found the Norwegians had 　　1　　 them in the race to be the first ever to reach it．After 　　2　　 the British flag at the Pole, they took a photograph of themselves 　　3　　 they started the 950-mile journey back． 　　The journey was unexpectedly 　　4　　 and the joy and excitement about the Pole had gone out of them．The sun hardly 　　5　　．The snow storms always made it impossible to sight the stones they had 　　6　　 to mark their way home．To make things 　　7　　．Evans, whom they had all thought of 　　8　　 the strongest of the five, fell badly into a deep hole in the ice．Having 　　9　　 along for several days, he suddenly fell down and died． 　　The four who were 　　10　　 pushed on at the best speed they could 　　11　　．Captain Oates had been suffering for some time from the fact; at night his 　　12　　 feet swelled so large that he could 　　13　　 put his boots on the next morning, and he walked bravely although he was in great 　　14　　．He knew his slowness was making it less likely that 　　15　　 could save themselves．He asked them to leave him behind in his sleeping-bag, but they refused, and helped him 　　16　　 a few more miles, until it was time to put up the 　　17　　 for another night． 　　The following morning, 　　18　　 the other three were still in their sleeping-bags, he said．“I am just going outside and may be 　　19　　 some time．” He was never seen again．He had walked out 　　20　　 into the snow storm, hoping that his death would help his companions． (1) [　　] A． hit B． fought C． won D． beaten (2) [　　] A． growing B． putting C． planting D． laying (3) [　　] A． after B． until C． while D． before (4) [　　] A． safe B． fast C． short D． slow (5) [　　] A． rose B． set C． appeared D． disappeared (6) [　　] A． taken up B． cut up C． set up D． picked up (7) [　　] A． easier B． better C． bitter D． worse (8) [　　] A． to B． upon C． as D． in (9) [　　] A． battled B． struggled C． speeded D． waited (10) [　　] A． left B． lost C． defeated D． saved (11) [　　] A． manage B． try C． employ D． find (12) [　　] A． ached B． frozen C． harden D． harmed (13) [　　] A． hardly B． never C． seldom D． nearly (14) [　　] A． pain B． fear C． trouble D． danger (15) [　　] A． all others B． some others C． others D． the others (16) [　　] A． away B． with C． off D． on (17) [　　] A． bed B． tent C． blanket D． sleeping-bag (18) [　　] A． while B． since C． for D． once (19) [　　] A． missed B． separated C． passed D． gone (20) [　　] A． patiently B． lonely C． alone D． worriedly