In this passage, "optical" can be understood as related to ______.

A．light

B．audio

C．electronics

D．multimedia

For immigrant （移民） parents， passing on their native languages can be a struggle．

[单选题]F．rom the passage, we can infer that "popular" words are ______.A． essential to daily lifeB． not regular in usageC． convenient to useD． not*standard enough to be used

[单选题]In this passage, "learned" is used ______.A． as a word equal to "educated"B． as a word similar to "informed"C． as a word close to "acquired"D． as a word opposite to "popular"

[单选题]A．s used in this passage, "structures" means ______.A． enduranceB． organizationC． necessary partsD． energy

[单选题]A．ccording to the passage, both "popular" words and "learned" words ______.A． seem to be of no useB． can help people to get a better comprehension of the language.C． are easy to masterD． have gone beyond our mother's reach

[单选题]It can be inferred from the passage that international students in the programs __.A． get full scholarshipB． pay no tuitionC． get no financial supportD． earn more money

[单选题]It can be inferred from the passage that Social Security privatization will_____.[A] provide high returns for the new governments [B] be strongly opposed by Wall Street[C] bring the future retirees more benefits [D] allow individuals to invest in per

[单选题]It can be inferred from the passage that the goal of Leopold and Rudolph Blaschka was to ______.A． create a botanical garden where only exotic flowers growB． do a thorough study of plant structureC． make a copy of one member of each United States flo

[单选题]This passage can be classified as________.A． an advertisementB． a book reviewC． a feature storyD． A news report

[单选题]It can be inferred from the passage thatA．students taking part in basket ball will walk to the courts.B．every student can gain admission to one of the four sportsC．hiking students can have a regular rest in the shade of treesD．students taking up the